SU107767A1 - Reaction furnace for oxidative pyrolysis of methane - Google Patents

Description

The known reaction furnaces of oxidative pyrolysis of methane in acetylides turned out to be unsuitable for increasing their productivity, and especially in terms of the spread of combustion from the flame to the entire cross section of the gas flow in the reaction zone.

The described invention is aimed at eliminating the disadvantages of the known reaction furnaces of the oxidative pyrolysis of methane to acetylene and consists in making the reaction zone in the form of a flat chamber of a small width with fortified, with flow walls of the streamlined profile, feeding the methane-oxygen mixture through a cooled collector through a narrow gap or nozzle. at the same location and with the heating of stabilizing oxygen in one or two combustion chambers.

FIG. 1 shows the proposed oven in three projections. - It consists of a reaction chamber /, made in the form of a vertically set flat cavity, and two furnace chambers 2 for heating stabilizing oxygen, located against the long sides of the reaction chamber.

Each furnace chamber is equipped with a burner 3 and. a separate channel for the entry of stabilizing oxygen.

With one combustion chamber (Fig. 2), it is necessary to ensure a uniform and unimpeded inflow of stabilizing oxygen on both sides of the row of soyel 4 or bushel 5 (Fig. 3).

A collector 6 is located above the reaction chamber along its length for feeding the initial methane-oxygen mixture into the furnace. The collector is made in the form of a pipe or a duct (1 ±) ig. four). On the collector side, facing the reaction chamber, are placed in one row of nozzle 4 or narrow pael 5. In the latter case, to prevent a change in the width of the shell, due to gas pressure in the collector and due to thermal deformations, it is provided with transverse partitions 7 of the streamlined profile .

In order to avoid overheating and burn-out of the collector 6 due to heat radiation from the reaction zone, a jacket 3 was used to cool the collector with water or other agent. To ensure an exactly fixed position of the nozzle or slit relative to the entrance to the reaction chamber and eliminate the deflecting collector reactive ethanocon jets (or flat jets with slit handles, the collector 6 is fixed in the walls, the housing is not firmly on the inlet side of the methane-oxygen mixture — rigidly the end is fixed through the gland 9 to compile the thermal extensions and the collar who p. To the fitting of the collector 10 of the collector 6 is attached a mixer for the preparation of the oxygen – oxygen mixture and a tap from the mixer, and exchanging the latter for some distance from the furnace. The heating temperature stabilized by its oxygen in the combustion chambers 2 is controlled by thermocouples //. For visual observation of the condition of the nozzles (or n; ate), as well as for the warm flame the operation time of the furnace1 is provided by the chapters 12. The temperature regime of the reaction chamber is controlled by thermocouples 13. The lining of the reaction chamber, the spaces above it (kiln neck) and the combustion chambers are made of high-refractory materials such as high-alumina chamotte, core lp, magnesite, hromomagnezit n m. p. For such a material layer followed by a layer of chamotte class A, and then heat tsionnp materi .ch. Collector 6 and the jacket of the refrigerator, as well as the nozzles 4 or the walls of the slot 5 are made of heat-resistant steel. The furnace has a round or right-angle section. Her laying is enclosed in a metal casing with the bottom welded to the shell. Top plate bolted on. The furnace is placed on a plate; it is a precast reinforced concrete bed, up;} to a sufficient height above the ground level. Under the furnace there is a quenching chamber 14, which is a box, in which the i-ia gas flow from the reaction zone is separated, the collectors 15 with spray nozzles serve for cooling water supply (and the first pyrolysis gas. The collector 15 must be arranged so that the flow of pyrolysis gas from the reaction chamber / does not wash the nozzles, in the opposite case, deposits of soot and tarry BeniecTB accumulate on them. Cooling water from the quenching tank to the chamber is removed through fitting 16. To remove the gas from pyrolysis there is two choke / 7, through one of them the gas is sent to the gas cleaning equipment (skrzber, electrostatic precipitator) II is then transferred to the plant for acetylene extraction, and through the second - to the candle, which is necessary during the ignition of the furnace and its output to the optimum process mode. In addition, there are a manhole 18 and an explosive membrane in the walls of the quenching chamber. 19. Matter of the invention 1. A reaction furnace for oxidizing; pyrolysis of the gas in a high-velocity gas stream, consisting of a reaction chamber and a furnace, with multi-jet supplying the methane-oxygen mixture to the reaction zone and the collector with the cooling jacket m, from li ous and the fact that, in order to reduce the thickness of the gas flow and to ensure uniform supply of the Liziruyushchego oxygen to the surface of all the jets, replaced nozzles dispersed in a row on the collector, located above the reaction zone, identified in the form of a flat chamber. 2. The form of the reaction furnace according to claim 1, stating that one end of the collector is rigidly fixed in the wall of the furnace from the side of the methane-oxygen mixture, and the other end is provided with an oil seal.

3. Modification of the reaction furnace according to claims. 1 and 2, characterized in that, in order to accelerate the process, for the submersible methane-oxygen mixture, a slit with reinforcing partitions is arranged in the reaction chamber on the collector.

4. Form of the reaction furnace, but PP. 1-3, characterized in that against the long sides of the reaction chamber are the combustion chambers.

5. The form of the reaction furnace according to claims. 1-4, characterized in that for supplying water to the quenching chamber, in the latter a collector with nozzles is mounted outside the zone of the two-way gases.

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